We report a general method for the synthesis of polymer-decorated metal-organic frameworks(MOFs)for the fabrication of superhy-drophobic materials through photoinduced metal-free atom transfer radical polymerization(A...We report a general method for the synthesis of polymer-decorated metal-organic frameworks(MOFs)for the fabrication of superhy-drophobic materials through photoinduced metal-free atom transfer radical polymerization(ATRP).Firstly,an MOF material,ZIF-8-NH_(2),was syn-thesized through the self-assembly of metal ions and organic ligands at room temperature.ZIF-8-NH_(2)was then reacted with glycidyl methacry-late(GMA)to form ZIF-8@GMA.Finally,ZIF-8@GMA-PHFBA was prepared by grafting fluorinated monomer 2,2,3,4,4,4-hexafluorobutyl acrylate(HFBA),from the ZIF-8@GMA surface via photoinduced ATRP under 365 nm UV light.The structural evolution during the metal-free ATRP modifi-cation of ZIF-8-NH_(2)was characterized by Fourier transform infrared spectroscopy(FTIR),X-ray powder diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),and thermogravimetry analysis(TGA).The test results verified that ZIF-8-NH_(2)and ZIF-8@GMA-PHFBA were successfully synthesized,and that the surface graft polymerization did not change the structure and morphology of ZIF-8-NH_(2).After anchoring the ZIF-8@GMA-PHFBA hybrid material on the fabric surface,the water contact angle(WCA)of the ZIF-8@GMA-PHFBA hy-brid material-modified fabric surface reached 154.2,which achieved a superhydrophobic state.In addition,the oil-water separation experiment and self-cleaning test demonstrated that the ZIF-8@GMA-PHFBA hybrid material-modified fabric has an excellent oil-water separation effect and self-cleaning performance.This material shows promising potential for applications in self-cleaning and oil-water separation technologies.展开更多
[ Objective] The research aimed to conduct objective evaluation on manner and effect of the artificial hail suppression operation in central Inner Mongolia. [ Method] Depending on analyses of the radar observation dat...[ Objective] The research aimed to conduct objective evaluation on manner and effect of the artificial hail suppression operation in central Inner Mongolia. [ Method] Depending on analyses of the radar observation data, hail shooting data and artificial hail suppression operation data in the middle region of Inner Mongolia （ represented by Huhhot） from 1990 to 2007, and combining capability of the artificial hail suppression operation tool （＂ 37＂ anti-aircraft gun）, nucleation rate of the catalyst and suitable catalyst volume in hail cloud per unit volume, objective evaluation of the manner and effect for artificial hail suppression operation in the area was obtained. [ Result] It was exacter to distinguish shape and intensity of the hail cloud, but it was uncertain to distinguish height of the hail cloud, when selecting operation target cloud. Operation height was still lower, and perfect seeding height couldn＇t be attained. Operation occasion was controlled well, but there still were phenomena of the late operation. Shell amounts of the operation were few obviously, needing to increase shell amount or to improve nucleation rate of the catalyst. [ Conclsion] Syntheti- cally, manner of the artificial hail suppression operation in central Inner Mongolia was suitable, and total efficiency was about 85%.展开更多
基金supported by the Natural Science Foundation of Shandong Province(Nos.ZR2021ME126,ZR2022ME139,ZR2021ME149)the Key Research and Development Program of Shandong Province-Project for Enhancing the Innovation Capacity of Teschnology-based Small and Medium-sized Enterprises(No.2024TSGC0957)the Research Foundation of Liaocheng University(Nos.318012012 , 318011905).
文摘We report a general method for the synthesis of polymer-decorated metal-organic frameworks(MOFs)for the fabrication of superhy-drophobic materials through photoinduced metal-free atom transfer radical polymerization(ATRP).Firstly,an MOF material,ZIF-8-NH_(2),was syn-thesized through the self-assembly of metal ions and organic ligands at room temperature.ZIF-8-NH_(2)was then reacted with glycidyl methacry-late(GMA)to form ZIF-8@GMA.Finally,ZIF-8@GMA-PHFBA was prepared by grafting fluorinated monomer 2,2,3,4,4,4-hexafluorobutyl acrylate(HFBA),from the ZIF-8@GMA surface via photoinduced ATRP under 365 nm UV light.The structural evolution during the metal-free ATRP modifi-cation of ZIF-8-NH_(2)was characterized by Fourier transform infrared spectroscopy(FTIR),X-ray powder diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),and thermogravimetry analysis(TGA).The test results verified that ZIF-8-NH_(2)and ZIF-8@GMA-PHFBA were successfully synthesized,and that the surface graft polymerization did not change the structure and morphology of ZIF-8-NH_(2).After anchoring the ZIF-8@GMA-PHFBA hybrid material on the fabric surface,the water contact angle(WCA)of the ZIF-8@GMA-PHFBA hy-brid material-modified fabric surface reached 154.2,which achieved a superhydrophobic state.In addition,the oil-water separation experiment and self-cleaning test demonstrated that the ZIF-8@GMA-PHFBA hybrid material-modified fabric has an excellent oil-water separation effect and self-cleaning performance.This material shows promising potential for applications in self-cleaning and oil-water separation technologies.
基金Supported by Science and Technology Innovation Item of Inner Mongolia Weather Bureau(nmqxkjcx200811)
文摘[ Objective] The research aimed to conduct objective evaluation on manner and effect of the artificial hail suppression operation in central Inner Mongolia. [ Method] Depending on analyses of the radar observation data, hail shooting data and artificial hail suppression operation data in the middle region of Inner Mongolia （ represented by Huhhot） from 1990 to 2007, and combining capability of the artificial hail suppression operation tool （＂ 37＂ anti-aircraft gun）, nucleation rate of the catalyst and suitable catalyst volume in hail cloud per unit volume, objective evaluation of the manner and effect for artificial hail suppression operation in the area was obtained. [ Result] It was exacter to distinguish shape and intensity of the hail cloud, but it was uncertain to distinguish height of the hail cloud, when selecting operation target cloud. Operation height was still lower, and perfect seeding height couldn＇t be attained. Operation occasion was controlled well, but there still were phenomena of the late operation. Shell amounts of the operation were few obviously, needing to increase shell amount or to improve nucleation rate of the catalyst. [ Conclsion] Syntheti- cally, manner of the artificial hail suppression operation in central Inner Mongolia was suitable, and total efficiency was about 85%.
